Pronunciation: (blot'ur),[key] —n. 1. a piece of blotting paper used to absorb excess ink, to protect a desk top, etc.
2. a book in which transactions or events, as sales or arrests, are recorded as they occur: a police blotter. 3. Mach.a soft washer of blotting paper or felt for cushioning a brittle object against shock or pressure or for increasing the friction or contact area between two surfaces.